Process of making boxes from pasteboard.



PATENTED JUNE 25, 1907 l J. Gom PROCESS 0F MAKING B0X APPLIUATION FIL REY ES FROM PASTEBOARD. BD Amm, 1906.

W/TNESSES fv@ 08M Uivrrnn srnrns PATENT onirica.

JONATHAN GODFREY, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE COMPRESSED PAPER BOX COMPANY, OF BRIDGEPORT, CONNECTICUT, A

CORPORATION OF CONNECTICUT.

Specification of Letters Patent.

Patented June 25, 190'7.

Application filed August 6,1906. Serial No. 329,436.

T0 all wiz/0m, t may concern:

Be it known that I,JONATHAN GODFREY, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Processes of Making Boxes from Pasteboard; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My yinvention vrelates vto the manufacture of boxes from pasteboard, and it consists of certain novel methods or processes particularly pointed out in the claims concluding this specification. A l

The following is a description of my improved process in the form in which I now prefer to practice it, and of the apparatus which I now prefer to employ in connection therewith, but it will be understoodthat my claims are not limited tothe employment of any particular apparatus, and'that the process herein described may be modified in various ways without departing from the spirit of my invention and without exceeding the scope of my claims.

Certain features of the process hereinafter described are not essential to the several features of ymy invention separately and broadly considered, and this will be indicated where in any given claim the omission of reference to steps or features of the process described will be understood to be a specific declaration that the omitted steps or features are not essential to the invention therein covered.

In the accompanying drawing Figures 1 and 2 are sectional elevations of a preferred form of apparatus for carrying out my process, showing respectively the position of the parts preparatory to the bending of the pasteboard blank and immediately after the blank has been initially acted upon to partially form the box prior to the ironing operation-Fig. 3 a broken plan showing one corner of the box after the stage of manufacture has proceeded as far as is shown at Fig. 2 Fig. 4 a view similar to Figs. 1 and 2, but showing the position of the parts of the apparatus after the box has been completely scribed and claimed a preferred apparatus for carrying out this process, which apparatus is the same asthat illustrated herein and lwhich will be hereinafter described with certain amplifications, but .I do not wish to be understood as claiming in the present application any structure whatever since my process is not limited to any particular mechanism for performing the several steps and producing the result aimed at.

' Incarrying out my improvement I prefer to employ a male die 1 and a female die 2 the latter being stationary while the former is actuated in any suitableand ordinary manner.

The upper inside portion of the female die is provided with a long flared portion as seen at 3 from the mouth down to the long lower or straight portion 4, and the edges of said mouth are perfectly rounded as shown at 5. The corner portions of said mouth are cut away and enlarged so as to form concave recesses 6 which are preferably of a circular shape and are chamfered or beveled as shown at 7.

Around the upper end of the die 2 is the usual keeper ring 8 which forms the chamber for the pasteboard blanks so that the latter may be rapidly deposited upon said die without danger of displacement. Around the male die 1 is a presser ring 9 through which said die moves freely which ring fits snugly the chamber formed by the ring 8.

The die 1 and ring 9 are operated by means of the usual power press, but it is not deemed necessary to show or describe any of the elements of such press since they are very ordinary.

The operation whereby pasteboard boxes are made by practicing my invention is as follows :-A pasteboard blank 10 is placed upon the die 2 within the chamber formed by the ring 8 the presser ring 9 now descends and pinches the blank around the edges, and

finally the die l is operated to draw up the blank into box form. As the die l, commences to form the box the stock will be drawn from beneath the ring 9, which latter only exerts a limited pressure and the surplus stock at the corners will be drawn into the recesses 6, and at the same time will be, forced by the gradually approximating dies into a series of plaits which latter are folded upon each other and the stock. As the die 1 continues to descend the flaring portion 3 will cause the edges of the blank to be bent up into a substantially vertical position whereby the box will be gradually conformed to said die so that there can be no breaking or n irregular mashing of the stock such as would occur should it be essayed to strike up the box by a quick short stroke operation after the manner exemplified in the cupping up of sheet metal. After the partially formed box has been forced into the straight portion L said box will thereby be completed and the -continued movement of the die l will cause overlap one another is shown at Fig. 3 in the instance of one of the corners, said plaits or folds being designated by the numeral 1l.

I prefer to form cutting edges at the inside of the ring S and the outside of the ring 9 so that the pasteboard may befed'between these rings in the form of a strip and the blanks cut therefrom and deposited on the female die.

The exact shape of the recesses Gis not material although I get the best results from the circular form and prefer to use this construction.

The object of the presser ring 9 is to exert a limited pressure upon the bl ank so that it will always be forced evenly into the female die7 but this ring is not absolutely essential in carrying out my process, especially when thin and pliable stock is used.

By my process the surplus stock at the corners of the box is not only evenly disposed of but is firmly compressed and ironed into permanent form, and a box is thereby produced with rounded corners which is an exceedingly strong and preferable construction.

I claim The process of making boxes from a pasteboard blank, which consists in bending the edges of the blank into substantially Vertical position7 and simultaneously forcing the surplus stock at the corners into a series of plaits, drawing the same between gradually approximating dies thereby folding the plaits upon each other and the stock at such corners and then ironing the same to compress the plaits into a condensed and permanent form.

In testimony whereof I aliix my signature in presence of two witnesses.

JONATHAN GODFREY.

Witnesses:

F. W. SMITH, Jr., M. T. LONGDEN. 

